Mecca is the birthplace of Muhammad and the site of the Kaaba, an important religious monument in Islam. It is a key location for Muslims, especially during the Hajj pilgrimage. The city's significance extends beyond religion into cultural and economic realms. ;
Mecca is the birthplace of Muhammad and home to the Kaaba, a sacred site in Islam. Every year, millions of Muslims perform the Hajj pilgrimage there, emphasizing its cultural and religious significance. Thus, the correct answer is D. Mecca.
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